Feature:1. [Combination Square] The combination angle ruler allows for easy marking and quick positioning, simple to operate, suitable for various projects.2. [360 Degree Rotation] This combination ruler can rotate 360 degree, allowing comprehensive angle measurement and marking, both internal and external angles can be measured.3. [Aluminum Alloy Construction] The angle disc is made from aluminum alloy, integrally formed with fine workmanship, resistant to falling, wear and erosion.4. [Tightening Nut] The combination ruler features a freely adjustable nut design, allowing for easy movement of the ruler for measurement.5. [Dual Scale] The sliding combination angle ruler features dual scales of metric and imperial system, clear and easy to read, hard wearing and lasting.Specification:Item Type: Combination SquareMaterial: Aluminum AlloyRuler Thickness: Approx. 2.5mm / 0.10inAngle Disc Thickness: Approx. 36mm / 1.42inLength: Approx. 500mm / 19.69inColor: Black.Package List:1 x Combination Square